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59ac8367 HR |
1 | /* |
2 | smsc47m192.c - Support for hardware monitoring block of | |
3 | SMSC LPC47M192 and LPC47M997 Super I/O chips | |
4 | ||
5 | Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de> | |
6 | ||
7 | Derived from lm78.c and other chip drivers. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/i2c.h> | |
29 | #include <linux/hwmon.h> | |
30 | #include <linux/hwmon-sysfs.h> | |
31 | #include <linux/hwmon-vid.h> | |
32 | #include <linux/err.h> | |
ce8c6ce1 | 33 | #include <linux/sysfs.h> |
59ac8367 HR |
34 | |
35 | /* Addresses to scan */ | |
36 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; | |
37 | ||
38 | /* Insmod parameters */ | |
39 | I2C_CLIENT_INSMOD_1(smsc47m192); | |
40 | ||
41 | /* SMSC47M192 registers */ | |
42 | #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \ | |
43 | (0x50 + (nr) - 6)) | |
44 | #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \ | |
45 | (0x54 + (((nr) - 6) * 2))) | |
46 | #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \ | |
47 | (0x55 + (((nr) - 6) * 2))) | |
48 | static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; | |
49 | static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; | |
50 | static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; | |
51 | #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f) | |
52 | #define SMSC47M192_REG_ALARM1 0x41 | |
53 | #define SMSC47M192_REG_ALARM2 0x42 | |
54 | #define SMSC47M192_REG_VID 0x47 | |
55 | #define SMSC47M192_REG_VID4 0x49 | |
56 | #define SMSC47M192_REG_CONFIG 0x40 | |
57 | #define SMSC47M192_REG_SFR 0x4f | |
58 | #define SMSC47M192_REG_COMPANY_ID 0x3e | |
59 | #define SMSC47M192_REG_VERSION 0x3f | |
60 | ||
61 | /* generalised scaling with integer rounding */ | |
62 | static inline int SCALE(long val, int mul, int div) | |
63 | { | |
64 | if (val < 0) | |
65 | return (val * mul - div / 2) / div; | |
66 | else | |
67 | return (val * mul + div / 2) / div; | |
68 | } | |
69 | ||
70 | /* Conversions */ | |
71 | ||
72 | /* smsc47m192 internally scales voltage measurements */ | |
73 | static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; | |
74 | ||
75 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
76 | { | |
77 | return SCALE(reg, nom_mv[n], 192); | |
78 | } | |
79 | ||
80 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
81 | { | |
82 | return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); | |
83 | } | |
84 | ||
85 | /* TEMP: 0.001 degC units (-128C to +127C) | |
86 | REG: 1C/bit, two's complement */ | |
87 | static inline s8 TEMP_TO_REG(int val) | |
88 | { | |
89 | return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000); | |
90 | } | |
91 | ||
92 | static inline int TEMP_FROM_REG(s8 val) | |
93 | { | |
94 | return val * 1000; | |
95 | } | |
96 | ||
97 | struct smsc47m192_data { | |
98 | struct i2c_client client; | |
99 | struct class_device *class_dev; | |
100 | struct semaphore update_lock; | |
101 | char valid; /* !=0 if following fields are valid */ | |
102 | unsigned long last_updated; /* In jiffies */ | |
103 | ||
104 | u8 in[8]; /* Register value */ | |
105 | u8 in_max[8]; /* Register value */ | |
106 | u8 in_min[8]; /* Register value */ | |
107 | s8 temp[3]; /* Register value */ | |
108 | s8 temp_max[3]; /* Register value */ | |
109 | s8 temp_min[3]; /* Register value */ | |
110 | s8 temp_offset[3]; /* Register value */ | |
111 | u16 alarms; /* Register encoding, combined */ | |
112 | u8 vid; /* Register encoding, combined */ | |
113 | u8 vrm; | |
114 | }; | |
115 | ||
116 | static int smsc47m192_attach_adapter(struct i2c_adapter *adapter); | |
117 | static int smsc47m192_detect(struct i2c_adapter *adapter, int address, | |
118 | int kind); | |
119 | static int smsc47m192_detach_client(struct i2c_client *client); | |
120 | static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); | |
121 | ||
122 | static struct i2c_driver smsc47m192_driver = { | |
123 | .driver = { | |
124 | .name = "smsc47m192", | |
125 | }, | |
126 | .attach_adapter = smsc47m192_attach_adapter, | |
127 | .detach_client = smsc47m192_detach_client, | |
128 | }; | |
129 | ||
130 | /* Voltages */ | |
131 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, | |
132 | char *buf) | |
133 | { | |
134 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
135 | int nr = sensor_attr->index; | |
136 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
137 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); | |
138 | } | |
139 | ||
140 | static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, | |
141 | char *buf) | |
142 | { | |
143 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
144 | int nr = sensor_attr->index; | |
145 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
146 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); | |
147 | } | |
148 | ||
149 | static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, | |
150 | char *buf) | |
151 | { | |
152 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
153 | int nr = sensor_attr->index; | |
154 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
155 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); | |
156 | } | |
157 | ||
158 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
159 | const char *buf, size_t count) | |
160 | { | |
161 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
162 | int nr = sensor_attr->index; | |
163 | struct i2c_client *client = to_i2c_client(dev); | |
164 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
165 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
166 | ||
167 | down(&data->update_lock); | |
168 | data->in_min[nr] = IN_TO_REG(val, nr); | |
169 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), | |
170 | data->in_min[nr]); | |
171 | up(&data->update_lock); | |
172 | return count; | |
173 | } | |
174 | ||
175 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
176 | const char *buf, size_t count) | |
177 | { | |
178 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
179 | int nr = sensor_attr->index; | |
180 | struct i2c_client *client = to_i2c_client(dev); | |
181 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
182 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
183 | ||
184 | down(&data->update_lock); | |
185 | data->in_max[nr] = IN_TO_REG(val, nr); | |
186 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), | |
187 | data->in_max[nr]); | |
188 | up(&data->update_lock); | |
189 | return count; | |
190 | } | |
191 | ||
192 | #define show_in_offset(offset) \ | |
193 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
194 | show_in, NULL, offset); \ | |
195 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
196 | show_in_min, set_in_min, offset); \ | |
197 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
198 | show_in_max, set_in_max, offset); | |
199 | ||
200 | show_in_offset(0) | |
201 | show_in_offset(1) | |
202 | show_in_offset(2) | |
203 | show_in_offset(3) | |
204 | show_in_offset(4) | |
205 | show_in_offset(5) | |
206 | show_in_offset(6) | |
207 | show_in_offset(7) | |
208 | ||
209 | /* Temperatures */ | |
210 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
211 | char *buf) | |
212 | { | |
213 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
214 | int nr = sensor_attr->index; | |
215 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
216 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); | |
217 | } | |
218 | ||
219 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, | |
220 | char *buf) | |
221 | { | |
222 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
223 | int nr = sensor_attr->index; | |
224 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
225 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); | |
226 | } | |
227 | ||
228 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, | |
229 | char *buf) | |
230 | { | |
231 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
232 | int nr = sensor_attr->index; | |
233 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
234 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); | |
235 | } | |
236 | ||
237 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, | |
238 | const char *buf, size_t count) | |
239 | { | |
240 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
241 | int nr = sensor_attr->index; | |
242 | struct i2c_client *client = to_i2c_client(dev); | |
243 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
244 | long val = simple_strtol(buf, NULL, 10); | |
245 | ||
246 | down(&data->update_lock); | |
247 | data->temp_min[nr] = TEMP_TO_REG(val); | |
248 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], | |
249 | data->temp_min[nr]); | |
250 | up(&data->update_lock); | |
251 | return count; | |
252 | } | |
253 | ||
254 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
255 | const char *buf, size_t count) | |
256 | { | |
257 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
258 | int nr = sensor_attr->index; | |
259 | struct i2c_client *client = to_i2c_client(dev); | |
260 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
261 | long val = simple_strtol(buf, NULL, 10); | |
262 | ||
263 | down(&data->update_lock); | |
264 | data->temp_max[nr] = TEMP_TO_REG(val); | |
265 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], | |
266 | data->temp_max[nr]); | |
267 | up(&data->update_lock); | |
268 | return count; | |
269 | } | |
270 | ||
271 | static ssize_t show_temp_offset(struct device *dev, struct device_attribute | |
272 | *attr, char *buf) | |
273 | { | |
274 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
275 | int nr = sensor_attr->index; | |
276 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
277 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); | |
278 | } | |
279 | ||
280 | static ssize_t set_temp_offset(struct device *dev, struct device_attribute | |
281 | *attr, const char *buf, size_t count) | |
282 | { | |
283 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
284 | int nr = sensor_attr->index; | |
285 | struct i2c_client *client = to_i2c_client(dev); | |
286 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
287 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); | |
288 | long val = simple_strtol(buf, NULL, 10); | |
289 | ||
290 | down(&data->update_lock); | |
291 | data->temp_offset[nr] = TEMP_TO_REG(val); | |
292 | if (nr>1) | |
293 | i2c_smbus_write_byte_data(client, | |
294 | SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); | |
295 | else if (data->temp_offset[nr] != 0) { | |
296 | /* offset[0] and offset[1] share the same register, | |
297 | SFR bit 4 activates offset[0] */ | |
298 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, | |
299 | (sfr & 0xef) | (nr==0 ? 0x10 : 0)); | |
300 | data->temp_offset[1-nr] = 0; | |
301 | i2c_smbus_write_byte_data(client, | |
302 | SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); | |
303 | } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0)) | |
304 | i2c_smbus_write_byte_data(client, | |
305 | SMSC47M192_REG_TEMP_OFFSET(nr), 0); | |
306 | up(&data->update_lock); | |
307 | return count; | |
308 | } | |
309 | ||
310 | #define show_temp_index(index) \ | |
311 | static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ | |
312 | show_temp, NULL, index-1); \ | |
313 | static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ | |
314 | show_temp_min, set_temp_min, index-1); \ | |
315 | static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ | |
316 | show_temp_max, set_temp_max, index-1); \ | |
317 | static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ | |
318 | show_temp_offset, set_temp_offset, index-1); | |
319 | ||
320 | show_temp_index(1) | |
321 | show_temp_index(2) | |
322 | show_temp_index(3) | |
323 | ||
324 | /* VID */ | |
325 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, | |
326 | char *buf) | |
327 | { | |
328 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
329 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
330 | } | |
331 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
332 | ||
333 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, | |
334 | char *buf) | |
335 | { | |
336 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
337 | return sprintf(buf, "%d\n", data->vrm); | |
338 | } | |
339 | ||
340 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, | |
341 | const char *buf, size_t count) | |
342 | { | |
343 | struct i2c_client *client = to_i2c_client(dev); | |
344 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
345 | data->vrm = simple_strtoul(buf, NULL, 10); | |
346 | return count; | |
347 | } | |
348 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
349 | ||
350 | /* Alarms */ | |
351 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
352 | char *buf) | |
353 | { | |
354 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
355 | int nr = sensor_attr->index; | |
356 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
357 | return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); | |
358 | } | |
359 | ||
360 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); | |
361 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); | |
362 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); | |
363 | static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000); | |
364 | static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000); | |
365 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); | |
366 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); | |
367 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); | |
368 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); | |
369 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); | |
370 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); | |
371 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); | |
372 | static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); | |
373 | ||
ce8c6ce1 JD |
374 | static struct attribute *smsc47m192_attributes[] = { |
375 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
376 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
377 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
378 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
379 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
380 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
381 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
382 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
383 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
384 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
385 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
386 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
387 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
388 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
389 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
390 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
391 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
392 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
393 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
394 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
395 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
396 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
397 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
398 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
399 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
400 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
401 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
402 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
403 | ||
404 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
405 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
406 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
407 | &sensor_dev_attr_temp1_offset.dev_attr.attr, | |
408 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
409 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
410 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
411 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
412 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
413 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
414 | &sensor_dev_attr_temp2_input_fault.dev_attr.attr, | |
415 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
416 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
417 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
418 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
419 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, | |
420 | &sensor_dev_attr_temp3_input_fault.dev_attr.attr, | |
421 | ||
422 | &dev_attr_cpu0_vid.attr, | |
423 | &dev_attr_vrm.attr, | |
424 | NULL | |
425 | }; | |
426 | ||
427 | static const struct attribute_group smsc47m192_group = { | |
428 | .attrs = smsc47m192_attributes, | |
429 | }; | |
430 | ||
431 | static struct attribute *smsc47m192_attributes_in4[] = { | |
432 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
433 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
434 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
435 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
436 | NULL | |
437 | }; | |
438 | ||
439 | static const struct attribute_group smsc47m192_group_in4 = { | |
440 | .attrs = smsc47m192_attributes_in4, | |
441 | }; | |
442 | ||
59ac8367 HR |
443 | /* This function is called when: |
444 | * smsc47m192_driver is inserted (when this module is loaded), for each | |
445 | available adapter | |
446 | * when a new adapter is inserted (and smsc47m192_driver is still present) */ | |
447 | static int smsc47m192_attach_adapter(struct i2c_adapter *adapter) | |
448 | { | |
449 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
450 | return 0; | |
451 | return i2c_probe(adapter, &addr_data, smsc47m192_detect); | |
452 | } | |
453 | ||
454 | static void smsc47m192_init_client(struct i2c_client *client) | |
455 | { | |
456 | int i; | |
457 | u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); | |
458 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); | |
459 | ||
460 | /* select cycle mode (pause 1 sec between updates) */ | |
461 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, | |
462 | (sfr & 0xfd) | 0x02); | |
463 | if (!(config & 0x01)) { | |
464 | /* initialize alarm limits */ | |
465 | for (i=0; i<8; i++) { | |
466 | i2c_smbus_write_byte_data(client, | |
467 | SMSC47M192_REG_IN_MIN(i), 0); | |
468 | i2c_smbus_write_byte_data(client, | |
469 | SMSC47M192_REG_IN_MAX(i), 0xff); | |
470 | } | |
471 | for (i=0; i<3; i++) { | |
472 | i2c_smbus_write_byte_data(client, | |
473 | SMSC47M192_REG_TEMP_MIN[i], 0x80); | |
474 | i2c_smbus_write_byte_data(client, | |
475 | SMSC47M192_REG_TEMP_MAX[i], 0x7f); | |
476 | } | |
477 | ||
478 | /* start monitoring */ | |
479 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, | |
480 | (config & 0xf7) | 0x01); | |
481 | } | |
482 | } | |
483 | ||
484 | /* This function is called by i2c_probe */ | |
485 | static int smsc47m192_detect(struct i2c_adapter *adapter, int address, | |
486 | int kind) | |
487 | { | |
488 | struct i2c_client *client; | |
489 | struct smsc47m192_data *data; | |
490 | int err = 0; | |
491 | int version, config; | |
492 | ||
493 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
494 | goto exit; | |
495 | ||
496 | if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) { | |
497 | err = -ENOMEM; | |
498 | goto exit; | |
499 | } | |
500 | ||
501 | client = &data->client; | |
502 | i2c_set_clientdata(client, data); | |
503 | client->addr = address; | |
504 | client->adapter = adapter; | |
505 | client->driver = &smsc47m192_driver; | |
506 | ||
507 | if (kind == 0) | |
508 | kind = smsc47m192; | |
509 | ||
510 | /* Detection criteria from sensors_detect script */ | |
511 | if (kind < 0) { | |
512 | if (i2c_smbus_read_byte_data(client, | |
513 | SMSC47M192_REG_COMPANY_ID) == 0x55 | |
514 | && ((version = i2c_smbus_read_byte_data(client, | |
515 | SMSC47M192_REG_VERSION)) & 0xf0) == 0x20 | |
516 | && (i2c_smbus_read_byte_data(client, | |
517 | SMSC47M192_REG_VID) & 0x70) == 0x00 | |
518 | && (i2c_smbus_read_byte_data(client, | |
519 | SMSC47M192_REG_VID4) & 0xfe) == 0x80) { | |
520 | dev_info(&adapter->dev, | |
521 | "found SMSC47M192 or SMSC47M997, " | |
522 | "version 2, stepping A%d\n", version & 0x0f); | |
523 | } else { | |
524 | dev_dbg(&adapter->dev, | |
525 | "SMSC47M192 detection failed at 0x%02x\n", | |
526 | address); | |
527 | goto exit_free; | |
528 | } | |
529 | } | |
530 | ||
531 | /* Fill in the remaining client fields and put into the global list */ | |
532 | strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE); | |
533 | data->vrm = vid_which_vrm(); | |
534 | init_MUTEX(&data->update_lock); | |
535 | ||
536 | /* Tell the I2C layer a new client has arrived */ | |
537 | if ((err = i2c_attach_client(client))) | |
538 | goto exit_free; | |
539 | ||
540 | /* Initialize the SMSC47M192 chip */ | |
541 | smsc47m192_init_client(client); | |
542 | ||
543 | /* Register sysfs hooks */ | |
ce8c6ce1 | 544 | if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group))) |
59ac8367 | 545 | goto exit_detach; |
59ac8367 HR |
546 | |
547 | /* Pin 110 is either in4 (+12V) or VID4 */ | |
548 | config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); | |
549 | if (!(config & 0x20)) { | |
ce8c6ce1 JD |
550 | if ((err = sysfs_create_group(&client->dev.kobj, |
551 | &smsc47m192_group_in4))) | |
552 | goto exit_remove_files; | |
553 | } | |
554 | ||
555 | data->class_dev = hwmon_device_register(&client->dev); | |
556 | if (IS_ERR(data->class_dev)) { | |
557 | err = PTR_ERR(data->class_dev); | |
558 | goto exit_remove_files; | |
59ac8367 | 559 | } |
59ac8367 HR |
560 | |
561 | return 0; | |
562 | ||
ce8c6ce1 JD |
563 | exit_remove_files: |
564 | sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); | |
565 | sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); | |
59ac8367 HR |
566 | exit_detach: |
567 | i2c_detach_client(client); | |
568 | exit_free: | |
569 | kfree(data); | |
570 | exit: | |
571 | return err; | |
572 | } | |
573 | ||
574 | static int smsc47m192_detach_client(struct i2c_client *client) | |
575 | { | |
576 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
577 | int err; | |
578 | ||
579 | hwmon_device_unregister(data->class_dev); | |
ce8c6ce1 JD |
580 | sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); |
581 | sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); | |
59ac8367 HR |
582 | |
583 | if ((err = i2c_detach_client(client))) | |
584 | return err; | |
585 | ||
586 | kfree(data); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) | |
592 | { | |
593 | struct i2c_client *client = to_i2c_client(dev); | |
594 | struct smsc47m192_data *data = i2c_get_clientdata(client); | |
595 | int i, config; | |
596 | ||
597 | down(&data->update_lock); | |
598 | ||
599 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
600 | || !data->valid) { | |
601 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); | |
602 | ||
603 | dev_dbg(&client->dev, "Starting smsc47m192 update\n"); | |
604 | ||
605 | for (i = 0; i <= 7; i++) { | |
606 | data->in[i] = i2c_smbus_read_byte_data(client, | |
607 | SMSC47M192_REG_IN(i)); | |
608 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
609 | SMSC47M192_REG_IN_MIN(i)); | |
610 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
611 | SMSC47M192_REG_IN_MAX(i)); | |
612 | } | |
613 | for (i = 0; i < 3; i++) { | |
614 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
615 | SMSC47M192_REG_TEMP[i]); | |
616 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
617 | SMSC47M192_REG_TEMP_MAX[i]); | |
618 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
619 | SMSC47M192_REG_TEMP_MIN[i]); | |
620 | } | |
621 | for (i = 1; i < 3; i++) | |
622 | data->temp_offset[i] = i2c_smbus_read_byte_data(client, | |
623 | SMSC47M192_REG_TEMP_OFFSET(i)); | |
624 | /* first offset is temp_offset[0] if SFR bit 4 is set, | |
625 | temp_offset[1] otherwise */ | |
626 | if (sfr & 0x10) { | |
627 | data->temp_offset[0] = data->temp_offset[1]; | |
628 | data->temp_offset[1] = 0; | |
629 | } else | |
630 | data->temp_offset[0] = 0; | |
631 | ||
632 | data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) | |
633 | & 0x0f; | |
634 | config = i2c_smbus_read_byte_data(client, | |
635 | SMSC47M192_REG_CONFIG); | |
636 | if (config & 0x20) | |
637 | data->vid |= (i2c_smbus_read_byte_data(client, | |
638 | SMSC47M192_REG_VID4) & 0x01) << 4; | |
639 | data->alarms = i2c_smbus_read_byte_data(client, | |
640 | SMSC47M192_REG_ALARM1) | | |
641 | (i2c_smbus_read_byte_data(client, | |
642 | SMSC47M192_REG_ALARM2) << 8); | |
643 | ||
644 | data->last_updated = jiffies; | |
645 | data->valid = 1; | |
646 | } | |
647 | ||
648 | up(&data->update_lock); | |
649 | ||
650 | return data; | |
651 | } | |
652 | ||
653 | static int __init smsc47m192_init(void) | |
654 | { | |
655 | return i2c_add_driver(&smsc47m192_driver); | |
656 | } | |
657 | ||
658 | static void __exit smsc47m192_exit(void) | |
659 | { | |
660 | i2c_del_driver(&smsc47m192_driver); | |
661 | } | |
662 | ||
663 | MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); | |
664 | MODULE_DESCRIPTION("SMSC47M192 driver"); | |
665 | MODULE_LICENSE("GPL"); | |
666 | ||
667 | module_init(smsc47m192_init); | |
668 | module_exit(smsc47m192_exit); |